Fastening device



Deca l2, 1950 v, F, zAHonlAKlN 2,533,414

FASTENING DEVICE Filed may 2e, 1945 4 6 INVENTOR. /y/cg-on? [''ZAHoD/AK/N.

" Arrow/EK Patented Dec. 12, 195,0

UNITED STATES ijATENT FFIC FASTENING DEVICE Victor F. Zahodiakin, Short Hills, N. J.

Application May 29, 1945, Serial No. 596,553

9 Claims. l

This invention relates to fastening devices, and more particularly to the stud-and-socket type providing a rotatable stud, and wherein the stud is separable from the socket. Specically, the instant invention is an improvement upon my prior Patent 2,262,418 of November 11, 1941.

In the prior construction of resilient bridges for fastening devices as exemplied in the prior patent referred to above, the flexing of the bridge toward the plane of attachment of the bridge feet necessitates an offset in the bridge to supply the additional length of the sloped position over level position. This fact places a heavy strain on and produces fatigue in the offset or leg portions of the bridge. Due to the angular disposition of the body of the bridge to the oiset or leg, and leverage exerted by the body, practically all of the iiexing is concentrated at or in the Vicinity of the bends or knees of the bridge rather than in the body thereof.

According to the present invention, the bridge is constructed to distribute the iiexing over a more extensive part of the bridge.

In its general aspect, the present invention further proposes utilization of a sectional bridge with telescopic parts for accommodating the different lengths of flexed and unflexed conditions.

A further object of the invention is to provide a strong stud-receiving socket portion for the bridge and yet provide for adequate resiliency of support therefor.

Another object of the invention is to aord more generous tolerance in attachment than was permitted in previous devices, and yet introduce no additional strain on the device or the attaching rivets or other means employed for the purpose.

Still further objects of the invention will appear to those skilled in the art to which it appertains, both by direct recitation thereof as the description progresses, and by implication from the context.

Referring to the accompanying drawing in which like numerals of reference indicate similar parts throughout the several views:

Figure 1 is a plan of my improved fastening device, looking at the same at What may be termed the back side since it is the side away from the operator when locking or unlocking the device;

Figure 2 is a similar plan, but with the stud not present;

Figure 3 is a similar plan of one section of the bridge having what is termed herein the 'inner telescopic socket portion;

Figure l is an underneath sectional plan of the bridge and stud taken on the plane of the member on which the bridge has its attachment;

Figure 5 is a perspective view of the bridge looking toward its under side and with the telescopic sections separated;

Figure 6 is a partial section taken on line 6 5 of Fig. 7, but with the stud 26, outer member 2l and rivets S6 shown in elevation; the stud in both Figs. 6 and 7 being shown in locked posi tion; and the scale of drawing of Figs. 6, 7 and 8 being increased over the showings of Figs. l to 4 inclusive;

Figure '7 is a, partial section on line 'l-'l' of Fig. 6, but with the stud 2@ and both members 2li and 2l shown in elevation;

Figure 8 is a View similar to Fig. 6, but With the stud in its released position, the showing of this gure being in most part in elevation with only part of the bridge in section;

Figure 9 is a plan, partly broken away, of a modified three-piece bridge construction;

Figures 10 and ll are top and underneath plans or the third or socket-forming bridge piece of this modied construction;

Figure 12 is an end view of said socket-forming bridge piece;

Figure 13 is an end View of one of the end sections of the bridge;

Figure 14 is a sectional plan of a further modied bridge construction, also having a third or socket-forming bridge piece;

Figure 15 is a longitudinal sectional View of Figure 14 as on line l -i 5 thereof, but not show ing the members to be clamped; and

Figure 16 is a cross sectional View at the mid part of the bridge of Figures 14 and 15, as on line Iii-i6 of Fig. 15.

In the specific embodiment of the invention illustrated in said drawing, with attention directed initially to Figures 1-7, the reference numerals 2l), 2l designate juxtaposed members adapted to be clamped together in an overlapped atwise position. For convenience in making distingurhing reference thereto, the members will be referred to as inner member 2li and outer member 2l. At the part of said members where the fastening device is to be applied, both members are punched or otherwise provided with preferably round holes 22, 2e respectively which are arranged to register axially. The hole 22 as here shown in the inner member is larger than the hole 23 in the outer member and the outer member is inwardly offset, as at 24, an amount preferably equal to the thickness of the inner member and of cliametric size substantially equal to the hole of the inner member so as to seat therein and obtain nested location thereof in the hole and axial registration or the holes.

At the inside race of the inner member 2| and overlying or spanning the hole 22 thereof, is the socket member constituted as a bridge 25 the midportion whereof is generally parallel to the member 23 and provides a hole or opening for passage of the stud 25. The bridge E is made extensible, for which purpose it is shown Figures 1 to 'l' as composed of sections 2, 28 each having a portion telescoping with respect to a portion of the other section the telescopic porn tions together forming the aforementioned midportion of the bridge. As shown, section 2l provides a bridge midportion 29 larger than and telescopically receiving the smaller bridge midpcrtion Si; of the other section, and these portions will be designated the outer and inner telescopic socket portions. Preferably the side rims of these telescopic portions are anged or curled rst perpendicular to and then inwardly parallel to the main body thereof. In thus forming the sections, the one having the inner telescopic portions 3S provides narrow flanges 3l along its side edges, with the thickness of the material substantially determining the offset of the iiange from the body. The offset of the outer telescopic midsection flange 32 from its body portion is made adequate to receive the inner section inclusive oi the anges thereof with a sliding iit. Preferably said flanges 32 of the outer telescopic portion are long enough to substantially meet, thus forming an under deck for the midportion of the said outer telescopic portion, and a flattened tubular receptacle for receiving the inner telescopic portion.

Each telescopic section 2, 28 has, as a continuing part of the metal of telescopic portions 2S, 3i), a sloping leg 3S which terminates at its outer end as a foot Se with a hole 35 therein for a rivet 3S or other fastening means by which the sections are each secured to the member 2Q being clamped. In consequence of the telescopic connec-tion between the two sections, greater tolerance is permissible in riveting the sections to the member than if said bridge were one piece.

The midportion of the bridge, thickness whereof is increased by presence of telescopic portions forming the same, constitutes the socket of the fastening device. Both telescopic portions 29, Si) are therefore appropriately apertured in substantial axial alignment with the stud hole 22 of member 28. The aperture 3? in the face of bridge section El" most remote from the member 2E! has a configuration generally circular at its middle but with diametrically opposite radiating slots giving to the aperture' the appearance of a double keyhole, as best seen in Figure 2. The radiating slots are shown extending in a direction length wise of the bridge. At 90 rotative displacement from the slot direction, the said bridge section face (looking at it from the rear) has hollow-s or depressions 3B with the material forming the leyel land portion of the bridge next the slots sloping counter-clockwise to the bottom of the depression and therebeyond rising abruptly to form stops 39 in the same rotative direction.

The under deck of the outer telescopic portion 29 has its aperture iii for the stud coaxial with the socket aperture 3'! and of adequate diameter to pass the stud therethrough, the said diameter 4 of this aperture li@ being substantially equal to the span provided by the slots of aperture 37. Likewise the inner telescopic portion 30 has an aperture il! therein the same being shown elongated or elliptical to accommodate the relative sliding movement encountered in use between said telescopic portions.

For coopera-tion with the resilient bridge and its socket as above described, and rotatably carried by outer member 2l, is a stud, before mentioned as 26, and shown as having a dat kerfed head seated in the depression of the outer member, and having a shank projecting through said members and engageable in the aforementioned apertures or the bridge. The end part of the stud remote from the head is formed as a blade twisted to provide a steep helix. The end margin of the blade reaches far enough to enter the aperture 3'! of the outer telescopic portion of the bridge and is insertable therein when the members are brought together ready to be clamped. After this insertion of the end margin of the blade, said stud, and the blade, are rotated and by virtue of the helical character of the 'blade and slotted formation of the aperture, screw action dravu's the bridge at its mid-portion toward the members. In View o the construction described, this movement of the midportion of the bridge toward said members lessens the length of the bridge by virtue of the telescopic assembly and flexibility of the leg portions of the sections. The depression of the bridge accordingly does not introduce any harmful shearing stress on the rivets and furthermore is resisted by a resiliency effective in the greater part of the leg portions of the bridge.

The end cf the blade toward the stud head is undercut to provide transverse shoulders at a common planar distance from the head, and ultimately these shoulders ride out of the bridge aperture and over the iiat land portions onto the slopes leading into depressions 38 and come to rest in the said depressions against stops 39.

While in the foregoing description I have been specific in reciting by word the details of the pictorial disclosure, this procedure has been for purposes of clarity and not for purposes of restricting the invention to such details. For instance, the definition of telescopic assembly of the bridge sections is not to be understood as necessitating a direct overlapping of one section with the other, since a third element, such as a sleeve may receive ends of the bridge sections, or if desired, the ends of the bridge sections may overlap and s both be contained within the sleeve. Since mention is made of these possible modications, exemplary of many others which might be mentioned, Figures 9 to 16 have been presented to illustrate them.

In Figures 9 to 13 a bridge construction of socket device is shown having sections 28a the inner or contiguous end portions 38a whereof approximately abut rather than overlap and are both provided with curled side rims for 0btaining like increase of thickness and rigidity. Sloping legs 33a and feet 34a riveted or otherwise secured to the member 2i) are provided as before described. For telescopic purposes, a attened sleeve 29a is provided which receives said end portions 33a telescopically with respect to both. Inward of contiguous end efi'es of each end portion 35i@ is a half -round aperture, the same opposing each other to form a complete oval aperture lla for the stud 26. The sleeve 29a forms the socket member and has upper and lower decks, the lower deck 32a likewise being formed with an aperture 40a for the stud. The upper deck is provided with a double key hole aperture 37a, depressions 38a and stops 39a as described above for aperture 31, depressions 38 and stops 3S. For purposes of limiting the sleeve 29a in movement on the sections 28a, stops, here shown in the forni of mounds 4S, are pressed out of the metal of legs 33a to present an edge across the .path of movement of lower deck 32a. These mounds are spaced from each other in normal position of the bridge, before the bridge is depressed, to allow the desired telescopic movement resulting from such depression.

Again, in Figures 14 to 16 is illustrated a modication broadly related above and showing sections 23h the contiguous end portions 3b of which overlap. In this showing the curled edges or rims Sib for obtaining reenforcement and for gaining thickness are so disposed that on one or upper section the rims are at the top thereof whereas on the other section they are at the underside. Sloping legs 33h and feet 34h are riveted or otherwise secured to the member 20 as previously described. For telescopic purposes, as in the modification last above described, a flattened sleeve 2% is provided which receives the overlapped end portions 30h telescopically with respect to both. The overlapped end portions provide apertures lib for stud 26. The sleeve 29h forms the socket member and has upper and lower decks, the lower deck 3227 likewise being formed with an aperture 45h for the stud. The upper deck is provided with a double keyhole aperture 37b, depressions 38h and stops 39h as above described for aperture 31, depressions 38 and stops 39. Similarly to the modification of Figures 9-13, sleeve 29h is held approximately centered on sections 28h, by mound-like stops 6b pressed out of the metal legs 33D, one of said mounds being pressed upwardly and the other downwardly to be in proper intercepting position. As before, these mounds afford adequate movement of the bridge sections for the required depression under influence of the stud.

I claim:

'1. A fastening device for juxtaposed members, comprising a socket structure constructed and arranged to receive a rotatable stud for interlocking therewith and separable therefrom, said socket structure comprising separable bridge sections both of which provide longitudinal margins at the side edges of and longitudinally of said sections, and both said sections having stud-receiving apertures entirely between said margins and side edges, and means at said side edges and margins connecting said sections slidable longitudinally with respect to each other and retaining said sections against displacement with respect to each other laterally.

2. A fastening device for juxtaposed members, comprising a socket structure constructed and arranged to receive a rotatable stud for interlocking therewith and separable therefrom, said socket structure comprising bridge sections each having apertures for said stud and said sections having telescopic connection with each other adjacent said apertures.

3. A fastening device comprising a socket structure constructed and arranged to receive a rotatable stud having shoulders for interlocking with said socket structure, said stud and socket structure being releasable from each other, and said socket structure comprising a three part bridge composed of two resilient sections having tele- 6 scopic portions, and a sleeve telescopically receiving both of said portions.

4. A fastening device comprising a socket structure constructed and arranged to receive a rotatable stud having shoulders for interlocking with said socket structure, said stud and socket structure being releasable from each other, said socket structure comprising a three part bridge composed of two resilient sections having telescopic portions, a sleeve telescopically receiving both of said portions, and means for limiting inward telescopic sliding of said telescopic portions.

5. A fastening device comprising a socket structure constructed and arranged to receive a rotatable stud having shoulders for interlocking with said socket structure, said stud and socket structure being releasable from each other, said socket structure comprising a three part bridge composed of two resilient sections having telescopic portions, a sleeve telescopically receiving both of said portions, and mound-like stops on said resilient sections engageable against said sleeve for limiting inward telescopic sliding of said telescopic portions.

6. A fastening device comprising a socket structure constructed and arranged to receive a rotatable stud having shoulders for interlocking with said socket structure, said stud and socket structure being releasable from each other, said socket structure comprising a three part bridge composed of two resilient sections having overlapping portions, a sleeve telescopically receiving both of said portions, and means for limiting inward telescopic sliding of said overlapping portions.

7. A fastening device comprising a socket structure constructed and arranged to receive a rotatable stud having shoulders for interlocking with said socket structure, said stud and socket structure being releasable from each other, said socket structure comprising a three part bridge composed of two resilient sections having portions substantially abutting at the midportion of the bridge, and a sleeve telescopically receiving both of said portions each substantially half way through the sleeve, depression of said bridge telescoping said sections into closer abutting relation to each other and said sleeve adapted to remain substantially at the midportion of said bridge at various telescoped positions of the said portions.

8. A fastening device comprising a socket structure constructed and arranged to receive a rotatable stud for interlocking therewith and separable therefrom, said socket structure comprising a telescopic bridge having telescopic portions at the midpart of said bridge,.said portions having flanges along the opposite edges obtaining reenforcement therefor, and said bridge being telescopically held at flanged portions with said flanged portions providing a restricted area of slidable engagement.

9. A resilient tensioning device for locking studs, comprising a resilient bridge providing resilient bridge sections each having telescopio portions next an end thereof with longitudinal margins at opposite sides of said portions, and each telescopic portion having a stud-receiving aperture between said margins and proximate to one end of the section, and each section having a foot at its opposite end portion from said aperture, said telescopic portion and foot portion of each section lying in substantially parallel planes, and means at said margins of said sections retaining the telescopic portions in constant planar 7 relationto each other and permitting telescopio movement of said telescopic portions in directions toward and away from each other.

VICTOR F. ZAHODIAKIN.

REFERENCES CITED The foliowing references are of record in the ie of this patent:

Number Number 8 UNITED STATES PATENTS Name Date Wallace May 19, 1936 Watter Sept. 16, 1941 FOREIGN PATENTS Country Date Great Britain Oct. 19, 1942 

